Minigap in a superconductor–normal metal junction with paramagnetic impurities
B. Crouzy, E. Bascones, D. A. Ivanov
DOI 10.1103/PhysRevB.72.092501 · Physical Review B
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Abstract
We study the effect of spin-flip scattering on the density of states in a long diffusive superconductor–normal metal junction with transparent interface. We calculate the critical value of the spin-flip scattering rate at which the minigap closes and give the dependence of the minigap on the spin-flip rate. For the system we consider, the minigap and the critical spin-flip rate have the scale of the Thouless energy, and not of the superconducting gap.
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